ICD-10-CM 2027
ICD-10 code for ankle corrosion
From the official ICD-10-CM alphabetic index entry “Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) › ankle”. Page updated September 29, 2026.
About coding ankle corrosion
The ICD-10-CM code for ankle corrosion is T25.419 (Corrosion of unspecified degree of unspecified ankle). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T25.419.
Within T25.41, choose T25.419 (unspecified ankle) only when documentation doesn't support a more specific option: right ankle (T25.411) and left ankle (T25.412).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific ankle corrosion codes (official index)
- first degree T25.519 — Corrosion of first degree of unspecified ankle
- left T25.412 — Corrosion of unspecified degree of left ankle
- first degree T25.512 — Corrosion of first degree of left ankle
- second degree T25.612 — Corrosion of second degree of left ankle
- third degree T25.712 — Corrosion of third degree of left ankle
- multiple with foot
- right T25.411 — Corrosion of unspecified degree of right ankle
- first degree T25.511 — Corrosion of first degree of right ankle
- second degree T25.611 — Corrosion of second degree of right ankle
- third degree T25.711 — Corrosion of third degree of right ankle
- second degree T25.619 — Corrosion of second degree of unspecified ankle
- third degree T25.719 — Corrosion of third degree of unspecified ankle
Common questions about ankle corrosion ICD-10 codes
What is the ICD-10 code for ankle corrosion?
- T25.419 — Corrosion of unspecified degree of unspecified ankle (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T25.519, T25.412, T25.512, T25.612 and others below.
What is the ICD-10 code for first degree ankle corrosion?
- T25.519 — Corrosion of first degree of unspecified ankle (header code; choose a more specific subcode).
What is the ICD-10 code for left ankle corrosion?
- T25.412 — Corrosion of unspecified degree of left ankle (header code; choose a more specific subcode).
What is the ICD-10 code for right ankle corrosion?
- T25.411 — Corrosion of unspecified degree of right ankle (header code; choose a more specific subcode).
What is the ICD-10 code for second degree ankle corrosion?
- T25.619 — Corrosion of second degree of unspecified ankle (header code; choose a more specific subcode).
What is the ICD-10 code for third degree ankle corrosion?
- T25.719 — Corrosion of third degree of unspecified ankle (header code; choose a more specific subcode).
Is T25.419 billable?
- No. T25.419 is a header code. Report one of its more specific subcodes instead.